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Chapter 3 - Additional Features
User Guide
195
NTP
The ntpclient is a
Network Time Protocol
(RFC-1305) client for UNIX- and Linux-based com-
puters
.
In order for the BLACK BOX
®
Advanced Console Server to work as a NTP client, the
IP address of the NTP server must be set in the file /etc/ntpclient.conf.
The script shell /bin/ntpclient.sh reads the configuration file (/etc/ntpclient.conf) and build
the line command to call /bin/ntpclient program.
Parameters Involved and Passed Values
The file /etc/ntpclient.conf has the value of two parameters:
The data and time will be update from the NPT server according to the parameter options.
The ntpclient program has this syntax:
ntpclient [options]
Options:
NTPSERVER
The IP address of the NTP server.
INTERVAL
Check time every interval seconds (default 300).
-c count
Stop after count time measurements (default 0 means go forever).
-d
Print diagnostics.
-h hostname
NTP server host (mandatory).
-i interval
Check time every interval seconds.
-l
Attempt to lock local clock to server using adjtimex(2).
-p port
Local NTP client UDP port.
-r
Replay analysis code based on stdin.
-s
Clock set (if count is not defined this sets count to 1).